Photo: Eleanor StillsAs fans of Graham Nash know, the singer/songwriter is as busy as he's ever been, with a new solo tour scheduled to kick off September 10 and his autobiography, Wild Tales, set to arrive in stores later that month.

Nash tells ABC News Radio that he's excited to hit the road solo, since it will give him the chance to sing some of his "lesser-performed" material as well as to introduce brand-new tunes.

Meanwhile, prior to the solo outing, Graham and his good friend and musical partner David Crosby have scheduled a few shows as a duo. Three of these concerts -- one in Pasadena, California, and two in Hawaii -- will be benefits for various causes near and dear to Nash's heart.

The first of these concerts will take place this Sunday at the Pasadena Playhouse and will raise money for the Five Acres charity's Grace Center, which provides support for women in crisis situations. Nash notes that the center is partly run by Marilyn Wells, the wife of his and Crosby's friend, TV and film producer John Wells.

The next of these fundraisers is scheduled for this Tuesday, August 29, at the Castle Theater in Kahului, Maui.

"We have a dear friend, [Robert "Bobalou" Benavides,] who grows exotic flowers on Maui, and he has a daughter with special needs," explains Graham. "And we're doing a benefit…to help buy her transportation that can free up her life." Besides Crosby & Nash, the show also includes Jackson Browne.

Lastly, the duo is scheduled to play an August 30 concert on the island of Kauai, where Nash owns a home, that will benefit various environmental organizations. One issue on which the event is focusing is the campaign to keep genetically modified food out of Kauai.

"What Monsanto and the other chemical companies are doing, in terms of our food supply, is dreadful," declares Nash.

Joining Crosby & Nash at the Kauai show will be Browne, Heartbreakers guitarist Mike Campbell and surfer/musician Donavon Frankenreiter.

Graham also shared some information about Crosby's upcoming solo album, revealing that the recording is being mixed "as we speak by [his son, Crosby, Stills & Nash keyboardist] James Raymond back in Los Angeles." He adds that the album will be coming out probably "sometime about February of next year." In addition, Nash reports that Crosby likely will head out on his own solo tour to support the record sometime after Christmas.